This is a shameless plug for an excellent & reasonably priced sight tool.
I borrowed one of these from a friend & just completed two sight swaps on an M&P 45 & a P226. Friend told me he bought his for $65 on ebay, but I just found/purchased an identical one for a mere $35.
And here's me using a brass punch and mallet all these years. I suppose if you drift your sights often enough that makes sense and it's way cheaper than some I've seen.